# 复制整行： Ctrl + D
# 格式化：Ctrl + Alt + L
# 整体标注：Ctrl + /


# 求圆的周长
# import math
# radius = int(input("Enter the radius of the circle: "))
# print(f"The perimeter of the circle with radius {radius} is {round((2*math.pi*radius),2)}")

# 求圆的面积
# import math
# radius = int(input("Enter the radius of the circle: "))
# area = math.pi * radius**2
# print("The area of the circle is:", round(area, 2))

# 求斜边长
# edge1 = float(input("Enter a number: "))
# edge2 = float(input("Enter a number: "))
# print(f"第三条斜边长为 {pow((edge2**2 + edge1**2), 0.5)}")
# print(f"第三条斜边长为 {math.sqrt(edge2**2 + edge1**2)}")

# 1 2 3 4 组成互不相同的三位数,分别是什么，一共有多少
for i in range(1, 5):
    for j in range(1, 5):
        for k in range(1, 5):
            if i != k and j != k and i != j:
                print(i * 100 + j * 10 + k)




